I have added a settings bundle to my application consisting of a number of toggle switches, It is being used to display different images depending on which toggle is active. This works fine the first time but once the values has been set to YES it always returns YES.
I have deleted the data within NSUserDefaults using the below
NSString *appDomain = [[NSBundle mainBundle] bundleIdentifier];
[[NSUserDefaults standardUserDefaults] removePersistentDomainForName:appDomain];
which works if the settings are changed before every launch of the application. (not ideal). Has anyone come across this and know how the values can be updated and persist? Below is my code where i am retrieving and seeing from BOOL value
BOOL setImageOne = (BOOL)[[NSUserDefaults standardUserDefaults]valueForKey:#"ladbrokes"];
BOOL setImageTwo = (BOOL)[[NSUserDefaults standardUserDefaults]valueForKey:#"williamHill"];
if (setImageOne) {
self.clientLogoImageView.image = [UIImage imageNamed:#"clientOneLogo.png"];
}
if (setImageTwo) {
self.clientLogoImageView.image = [UIImage imageNamed:#"clientTwoLogo.png"];
}
NSString *appDomain = [[NSBundle mainBundle] bundleIdentifier];
[[NSUserDefaults standardUserDefaults] removePersistentDomainForName:appDomain];
The bool will be stored within an NSNumber object, as primitive types cannot be stored in Objective-C collection classes, so this statement:
BOOL setImageOne = (BOOL)[[NSUserDefaults standardUserDefaults]valueForKey:#"ladbrokes"];
is basically the same as:
NSNumber *boolObj = #(NO);
BOOL b = (BOOL)boolObj; // b == YES
when what you intended was:
BOOL b = [boolObj boolValue]; // b == NO
Use [NSUserDefaults boolForKey] instead.
Related
I am encountering a strange issue in iOS 8.2 where [NSUserDefaults standardUserDefaults] is returning nil on iPhone. This same logic untouched has worked on all previous releases of iOS. I have a universal app which has two different settings.plist one for iPad and the other for iPhone list as follows;
Settings.bundle-
-Root.plist
-Root~iphone.plist
When installed on devices the correct settings pane displays and the user can input the appropriate values for the given fields. Though in my app at runtime [NSUserDefaults standardUserDefalts] returns a nil object.
What might I be doing wrong? Has Apple changed what is expected in 8.2?
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
userDefaults is always nil no matter what preferences are set in system settings.
Did you set the dictionary to use as "Settings.bundle/Root.plist"?
// Register the preference defaults from file "Settings.bundle/Root.plist"
NSDictionary *dictionary = [NSDictionary dictionaryWithContentsOfFile:
[[NSBundle mainBundle] pathForResource:#"Settings.bundle/Root"
ofType:#"plist"]];
[[NSUserDefaults standardUserDefaults] registerDefaults:dictionary];
Thereafter [NSUserDefaults standardUserDefaults] no longer is nil.
In my case, the dictionary used by [NSUserDefaults standardUserDefaults] looks like this in the debugger:
{
PreferenceSpecifiers = (
{
DefaultValue = 1;
Key = sortByDistance;
Title = "Sortiere nach Entfernung";
Type = PSToggleSwitchSpecifier;
}
);
StringsTable = Root;
}
To access the preferences I've written a tiny method:
- (id) preferenceValueForKey: (NSString *)key {
NSArray *preferences = [[NSUserDefaults standardUserDefaults] arrayForKey:#"PreferenceSpecifiers"];
NSUInteger index = [preferences indexOfObjectPassingTest:^BOOL(id obj, NSUInteger idx, BOOL *stop) {
return [[obj valueForKey:#"Key"] isEqualToString:key];
}];
return [preferences[index] valueForKey:#"DefaultValue"];
}
Im trying to develop an app that displays a random truth or dare type question, however the user has the ability to turn off truths or dares in option. I have successfully managed to get the app to display a random quote from a plist file from either the truth or dare array also i have managed to program two switch buttons in the user options view controller.
My problem is how would i go about displaying only a truth or dare or both if the user has turned on of the uiswitchs off?
- (IBAction)button:(id)sender
{
if (!self.plistArray)
{
NSString *path = [[NSBundle mainBundle] pathForResource:
#"data" ofType:#"plist"];
NSUserDefaults *defaults =[NSUserDefaults standardUserDefaults];
if ([[defaults objectForKey:#"truthonoff"] isEqualToString:#"YES"])
{
NSDictionary *plistDict = [[NSDictionary alloc] initWithContentsOfFile:path];
NSArray *plistArray1 = plistDict[#"truth"];
}
if ([[defaults objectForKey:#"dareonoff"] isEqualToString:#"YES"])
{
NSDictionary *plistDict2 = [[NSDictionary alloc] initWithContentsOfFile:path];
NSArray *plistArray2 = plistDict2[#"dare"];
}
self.plistArray = [[plistArray1 arrayByAddingObjectsFromArray:plistArray2] mutableCopy];
}
NSLog(#"%#", plistArray);
//check to see if array is empty and display message
if ([plistArray count] == 0)
{
self.text.text = #"array empty";
}
else
{
//display random quote from array
int randV = arc4random() % self.plistArray.count;
self.text.text = self.plistArray[randV];
[self.plistArray removeObjectAtIndex:randV];
}
}
That is my attempt however it will not run and i have the feeling it wont ddo the job i need.
Basicly i need it to display only truth if the user has selected that to true or only dare if that is selected or both if both are set to true.
EDIT
sorry the problem with the above code is the plist isnt being loaded and it is scipping straight to if array ==0 {
How do i ensure it loads the array and then checks which arrays to load from the plist file?
Any help is greatly appreciated
This is the code before i tried to add if statements. Im so confussed how best to do this
- (IBAction)shownext:(id)sender {
//load array and check then cycle through this untill array is empty. Array will add two arrays from plist file.
if (!self.plistArray) {
NSString *path = [[NSBundle mainBundle] pathForResource:
#"data" ofType:#"plist"];
NSDictionary *plistDict = [[NSDictionary alloc] initWithContentsOfFile:path];
NSArray * plistArray1 = plistDict[#"truth"];
NSDictionary *plistDict2 = [[NSDictionary alloc] initWithContentsOfFile:path];
NSArray *plistArray2 = plistDict2[#"dare"];
self.plistArray = [[plistArray1 arrayByAddingObjectsFromArray:plistArray2] mutableCopy];
}
NSLog(#"%#", plistArray);
//check to see if array is empty and display message
if ([plistArray count] == 0) {
self.text.text = #"array empty";
}
else {
//display random quote from array
int randV = arc4random() % self.plistArray.count;
self.text.text = self.plistArray[randV];
[self.plistArray removeObjectAtIndex:randV];
}
}
First, if you have a switch for truth and one for dare I hope you have something in place to deal with when the user turns both switches off and doesn't understand why they get nothing (trust me it will happen).
For the rest I'm not sure exactly how you app works but I will take a guess. I'm thinking you have a utility style app with the main UI in one view and then an info button that flips to a second view where the switches are. I'm also guessing that there is a button in the main view that retrieves a truth or dare string. My final assumption, based on your code above, is that when the user changes the state of a switch that writes a user default that you've use a #define to keep out spelling mistakes.
When your view loads you should load both arrays in case the user changes their mind in the middle of using your app and turns on both options or changes from one to the other. Depending on how many entries you have in each of those arrays you might consider creating a combined array as well to simplify things.
When the button is pressed you should then look at the defaults and see if you need to look at both arrays or just one (the below is pseudo code)
if(truth && dare) {
// if you have a combined array pick a random element from it.
// otherwise first randomly pick one of the arrays to pick from.
}
else if (truth) {
// get a random element from the truth array
}
else {
// get a random element from the dare array
}
Also, your current checks of the switch values will always return no unless you are doing extra work in the switch view controller. You should be using [defaults setBool:<UISwitch.isOn> forKey:<#definedKeyHere>] and [defaults boolForKey:<#definedKeyHere>].
It would really help to know what part isn't working. For one thing, it might help to store your flags as NSNumber objects instead of strings (could your string comparison be failing?). Then you could do something like:
if ([[defaults objectForKey:#"truthonoff"] boolValue])
Use a literal to add the actual NSNumber - #YES or #NO.
Consider changing your logic to something like:
VERIFY CODE - doing this freehand:
if (!self.plistArray)
{
self.plistArray = [NSMutableArray array];
NSString *path = [[NSBundle mainBundle] pathForResource:
#"data" ofType:#"plist"];
// why are you loading this twice?
NSDictionary *plistDict = [[NSDictionary alloc] initWithContentsOfFile:path];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if ([[defaults valueForKey:#"truthonoff"] boolValue])
{
[self.plistArray addObject:plistDict[#"truth"]];
}
if ([[defaults valueForKey:#"dareonoff"] boolValue])
{
[self.plistArray addObject:plistDict[#"dare"]];
}
}
I am assuming that your code to load the Plists is working. Verify all your keys match what's in the Plist. Set a breakpoint and verify.
Calling a method on a nil object is a no-op in Objective C. So, it'll happily ignore calls to nil objects without telling you. Verify you have what you think you have.
Also, here:
//display random quote from array
int randV = arc4random() % self.plistArray.count;
self.text.text = self.plistArray[randV];
[self.plistArray removeObjectAtIndex:randV];
Consider using arc4random_uniform(self.plistArray.count) as it avoids modulo bias in the generator.
Now, this just gives you say 0 or 1 if you have two elements. Are you sure the two dictionary keys, "truth" and "dare" actually point to arrays?
Ok, everything working to this point. Now, you have an array of ARRAYS! So you need to randomly pick a question array, and THEN randomly pick a question.
Something like:
//get random array
int randArrayIndex = arc4random_uniform(self.plistArray.count);
NSArray* questionArray = self.plistArray[randArrayIndex];
//get random question
int randQuestionIndex = arc4random_uniform([questionArray count]);
NSString* randomQuestion = questionArray[randQuestionIndex];
self.text.text = randomQuestion;
// remove question
[questionArray removeObjectAtIndex:randQuestionIndex];
Something like that anyway. Of course, assuming you are storing NSStrings in those Plist arrays.
I have a Scenario , where i have to call a Method only once , whenever a User Will Update the Application or make a Fresh Install.
SO my Question is there is any particular Method to be called in App Delegate , After We update the Application , so if someone can tell me a another way to Achieve this , that would be really appreciated.
I would set a value in NSUserDefaults after you have called the function one time. See the accepted answer here: iOS : Call a method just one time
If you need to run after an update, you should include an always increasing number, or pull the build number, and check against the saved value. This will allow you to know if the app has been updated.
I am writing following function which uniquely checks if user has rated the current version, [self nowRate] is the function, please change this to whatever action you want to perform uniquely per version
-(void)rateApp {
NSString *version = [[[NSBundle mainBundle] infoDictionary] objectForKey:#"CFBundleShortVersionString"];
NSMutableDictionary*appRatedForVersion = [[NSMutableDictionary alloc] init];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if ([[[NSUserDefaults standardUserDefaults] dictionaryRepresentation].allKeys containsObject:#"AppRateDictionaryData"]){
NSData *versionRateData = [defaults objectForKey:#"AppRateDictionaryData"];
appRatedForVersion = [NSKeyedUnarchiver unarchiveObjectWithData:versionRateData];
if ([appRatedForVersion objectForKey:version] != nil) {
NSNumber *isAppRatedForCurrentVersion = [appRatedForVersion objectForKey:version];
BOOL hasBeenRated = [isAppRatedForCurrentVersion boolValue];
if (hasBeenRated) {
//Action already performed in this version do whatever you like
} else {
[self nowRate];
}
} else {
[appRatedForVersion setObject:[NSNumber numberWithBool:YES] forKey:version];
NSData *versionRateData1 = [NSKeyedArchiver archivedDataWithRootObject:appRatedForVersion];
[defaults setObject:versionRateData1 forKey:#"AppRateDictionaryData"];
[defaults synchronize];
[self nowRate];
}
} else {
[appRatedForVersion setObject:[NSNumber numberWithBool:YES] forKey:version];
NSData *versionRateData = [NSKeyedArchiver archivedDataWithRootObject:appRatedForVersion];
[defaults setObject:versionRateData forKey:#"AppRateDictionaryData"];
[defaults synchronize];
[self nowRate];
}
}
I'm using in-app settings from http://www.inappsettingskit.com/. It is really great but I can't figure out how to have the settings automatically load into the in-app settings on launch.
When I launch my app for the first time, all of the in-app multi-value cells are blank.
What I want to know is how to load them when the app is launched the first time?
The defaults are loaded in from the settings bundle, but aren't being passed through to the in-app settings...currently this is my code that does that...
-applicationDidFinishLaunching:
//It is here that we set the defaults
NSString *textValue = [[NSUserDefaults standardUserDefaults] stringForKey:#"title_key"];
//If the first value is nil, then we know that the defaults are not set.
if(textValue == nil)
{
//We set the default values from the settings bundle.
//Get the bundle path
NSString *bPath = [[NSBundle mainBundle] bundlePath];
NSString *settingsPath = [bPath stringByAppendingPathComponent:#"Settings.bundle"];
NSString *plistFile = [settingsPath stringByAppendingPathComponent:#"Root.plist"];
NSDictionary *settingsDictionary = [NSDictionary dictionaryWithContentsOfFile:plistFile];
NSArray *preferencesArray = [settingsDictionary objectForKey:#"PreferenceSpecifiers"];
NSDictionary *item;
NSString *title_Key;
NSString *detail_Key;
NSString *sort_Key;
for(item in preferencesArray)
{
//Get the key of the item.
NSString *keyValue = [item objectForKey:#"Key"];
//Get the default value specified in the plist file.
id defaultValue = [item objectForKey:#"DefaultValue"];
if([keyValue isEqualToString:#"title_key"]) title_Key = defaultValue;
if([keyValue isEqualToString:#"detail_key"]) detail_Key = defaultValue;
if([keyValue isEqualToString:#"sort_key"]) sort_Key = defaultValue;
}
//Now that we have all the default values.
//We will create it here.
NSDictionary *appPrerfs = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:2], #"title_key",
[NSNumber numberWithInt:4], #"detail_key",
[NSNumber numberWithInt:2], #"sort_key",
nil];
[[NSUserDefaults standardUserDefaults] registerDefaults:appPrerfs];
[[NSUserDefaults standardUserDefaults] synchronize];
}
I have also tried the suggestion in the first answer, creating a seperate userDefaults.plist and have the defaults being loaded from there, my app is still getting the defaults but they are not passing through to in-app settings.
I thought that it should look like this on the first launching the app...
You want to register your NSUserDefaults first. Check out this description.
I have an iOS application with a settings.bundle that handles various settings for my application with Switch toggle. I set default values in my root.plist file (using the DefaultValue property) to YES but any time the application launches on a device or the iOS simulator all values go NO. It worked well only on the first launch.
I am retrieving the defaults with this code (am I doing something wrong here?):
NSUserDefaults *localeDefaults = [NSUserDefaults standardUserDefaults];
BOOL ENWORDS = [localeDefaults boolForKey:#"localetime"];
The Default Value is used by Settings.app for display purposes only. If you don't change the value in the settings app nothing is saved to NSUserDefaults.
You have to register the default values yourself. Use something like this in application:didFinishLaunchingWithOptions::
NSDictionary *userDefaultsDefaults = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithBool:YES], #"localetime",
nil];
[[NSUserDefaults standardUserDefaults] registerDefaults:userDefaultsDefaults];
This blog post might help : http://greghaygood.com/2009/03/09/updating-nsuserdefaults-from-settingsbundle
tl;dr - until the user opens the settings page then the defaults aren't copied into your app. This is the expected behavior by Apple.
Personally, I think this is terrible. It means that you will have to set your defaults in code just in case the user starts your app without going to the settings page first (which will be true for about 99% of use cases!)
The problem is the type of default Value must be boolean not string ;) delete this value and add a another default Value property again
hope this helps
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
//< Register Defaults
NSString *settingsBundlePath = [[NSBundle mainBundle] pathForResource:#"Settings" ofType:#"bundle"];
NSBundle *settingsBundle = [NSBundle bundleWithPath:settingsBundlePath];
NSString *rootPlistPath = [settingsBundle pathForResource:#"Root" ofType:#"plist"];
NSDictionary *settingsDict = [[NSDictionary alloc] initWithContentsOfFile:rootPlistPath];
NSArray *settingsItems = [settingsDict objectForKey:#"PreferenceSpecifiers"];
NSMutableDictionary *defaultDict = [NSMutableDictionary new];
for (NSDictionary *itemDict in settingsItems) {
if ([itemDict objectForKey:#"DefaultValue"]) {
[defaultDict setObject:[itemDict objectForKey:#"DefaultValue"] forKey:[itemDict objectForKey:#"Key"]];
}
}
[[NSUserDefaults standardUserDefaults] registerDefaults:defaultDict];
//< Following Code
}
You can check whether the value has been set by getting objectForKey and checking whether it is nil.
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
id dataExists = [userDefaults objectForKey:#"light_switch"];
BOOL lightSwitch;
if (dataExists != nil) {
lightSwitch = [userDefaults boolForKey:#"light_switch"];
NSLog(#"light_switch is %d", validateCertificates);
} else {
lightSwitch = YES; // default value
NSLog(#"light_switch not set, default value is %d", validateCertificates);
}